Effect of temperature gradient on transient thermal creep of heated and stressed concrete in transient state tests

被引:13
作者
Fan, Kunjie [1 ,2 ]
Li, Dawang [1 ,2 ]
Li, Long-yuan [2 ]
Wu, Jiayu [3 ]
机构
[1] Shenzhen Univ, Guangdong Prov Key Lab Durabil Maine Civil Engn, Shenzhen 518060, Peoples R China
[2] Univ Plymouth, Sch Engn, Plymouth PL4 8AA, Devon, England
[3] Jinan Univ, MOE Key Lab Disaster Forecast & Control Engn, Inst Appl Mech, Guangzhou 510632, Guangdong, Peoples R China
关键词
Concrete; Thermo mechanical load; Temperature gradient; Transient thermal creep; Load induced thermal strain; Explicit model; HIGH-PERFORMANCE CONCRETE; EARLY-AGE BEHAVIOR; CRACKING RESISTANCE; BARCHIP FIBER; STRAIN; MODEL; 600-DEGREES-C; STRENGTH;
D O I
10.1016/j.conbuildmat.2019.06.197
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The stress-strain constitutive relation of concrete subjected to thermomechanical loads is extremely complicated since its deformation relies on the sequences in which the heat and loads are applied. Existing experiments demonstrated that the development of quasi-instantaneous transient thermal creep, generally referred to as TTC, was dependent on the virgin heating of a mechanically pre-loaded concrete specimen. However, the mechanism behind it is still not fully understood. In this paper, a numerical method is developed to analyze the stress fluctuation and corresponding plastic strain caused by the combination of pre-load and temperature gradient. The results show that the TTC calculated using existing semi-implicit methods is reasonable only at early stage but could be wrong at high temperatures. The sharp increase of TTC beyond around 500 degrees C observed in many tests could be attributed to the implicit inclusion of the extra plastic strain resulted from temperature gradient. By excluding the extra plastic strain generated at different temperature levels, a more accurate formula for calculating TTC is proposed. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码:839 / 851
页数:13
相关论文
共 50 条
[41]   Temperature gradient monitoring and thermal evolution of a super mass concrete structure [J].
An R. ;
Lin P. ;
Chen D. ;
An B. ;
Lu G. ;
Lin Z. .
Qinghua Daxue Xuebao/Journal of Tsinghua University, 2023, 63 (07) :1050-1059
[42]   Transient and steady state creep response of ice I and magnesium sulfate hydrate eutectic aggregates [J].
McCarthy, Christine ;
Cooper, Reid F. ;
Goldsby, David L. ;
Durham, William B. ;
Kirby, Stephen H. .
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 2011, 116
[43]   Effect of high temperature on the strength and thermal conductivity of glass fiber concrete [J].
Wang, Wei-Chien ;
Wang, Her-Yung ;
Chang, Kao-Hao ;
Wang, Shao-Yu .
CONSTRUCTION AND BUILDING MATERIALS, 2020, 245
[44]   CONCRETE BASIC CREEP PREDI CTION BASED ON TIME-TEMPERATURE EQUIVALENCE RELATION AND SHORT-TERM TESTS [J].
Barani, O. R. ;
Mostofinejaad, D. ;
Saadatpour, M. M. ;
Shekarchi, M. .
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, 2010, 35 (2B) :105-121
[45]   Effects of transient temperature gradient on frost heave of saturated silty clay in an open system [J].
Ma, Hongyan ;
Cui, Yuanfang ;
Zhang, Jianqiao ;
Li, Song ;
Xu, Song .
RESEARCH IN COLD AND ARID REGIONS, 2023, 15 (06) :268-277
[46]   Effect of Temperature Gradient on Chloride Ion Diffusion in Nuclear Reactor Containment Building Concrete [J].
An, Boohyun ;
Cho, Pyungyeon ;
Shittu, Remilekun A. ;
Kim, Tae-Yeon ;
Rostron, Paul ;
AlFantazi, Akram ;
Yi, Yongsun .
ENERGIES, 2022, 15 (15)
[47]   Comparison of Temperature Gradient Effect on Curved Concrete Box Girder Based on Different Codes [J].
Zhao, Min ;
Di, Jin ;
Lu, Wenru ;
Dai, Jie ;
Qin, Fengjiang ;
Ning, Li .
CONSTRUCTION AND URBAN PLANNING, PTS 1-4, 2013, 671-674 :957-961
[48]   Temperature effect on concrete creep modeled by microprestress-solidification theory [J].
Bazant, ZP ;
Cusatis, G ;
Cedolin, L .
JOURNAL OF ENGINEERING MECHANICS, 2004, 130 (06) :691-699
[49]   Finite strain transient creep of D16T alloy: identification and validation employing heterogeneous tests [J].
Shutov, A. V. ;
Larichkin, A. Yu .
ALL-RUSSIAN CONFERENCE WITH INTERNATIONAL PARTICIPATION MODERN PROBLEMS OF CONTINUUM MECHANICS AND EXPLOSION PHYSICS DEDICATED TO THE 60TH ANNIVERSARY OF LAVRENTYEV INSTITUTE OF HYDRODYNAMICS SB RAS, 2017, 894
[50]   Influences of gas permeation with adsorption effect on the transient thermal insulation performance of silica aerogel at pressure and temperature differences [J].
Pang, Hao-Qiang ;
Zhang, Sheng-Nan ;
Zhang, Xu ;
Gao, Yan-Feng .
INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2022, 179